atlas: add board name to flash_ec
atlas: add board name to flash_ec

This teaches flash_ec that the atlas EC is an NPCX with internal SPI
flash.

BRANCH=none
BUG=b:75070158
TEST=NONE

Change-Id: I8d6d9556ebc7408695aaad764847d1cc06d95eae
Signed-off-by: Caveh Jalali <08e24a66aefda7a55ca7d73f8903e0fb16eec763@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/965637
Commit-Ready: caveh jalali <08e24a66aefda7a55ca7d73f8903e0fb16eec763@chromium.org>
Tested-by: caveh jalali <08e24a66aefda7a55ca7d73f8903e0fb16eec763@chromium.org>
Reviewed-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>
Reviewed-by: Duncan Laurie <70662b43bc1a20b57ded72a2b08be88dd0da4841@google.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec